Title:
PROCESS FOR MANUFACTURING Ni-BASED ALLOY, AND Ni-BASED ALLOY
Document Type and Number:
WIPO Patent Application WO/2019/107456
Kind Code:
A1
Abstract:
Provided is a method for manufacturing an Ni-based alloy, the method enabling a reduction in Mo segregation. A method for manufacturing an Ni-based alloy according to the present embodiment comprises: a casting step for casting a liquid alloy that is a raw material for an Ni-based alloy to manufacture an Ni-based alloy material; and a segregation reduction step for performing a uniform heating process, or performing a combined process that includes a uniform heating process, hot shearing machining, and a uniform heating process following the hot shearing machining, on the Ni-based alloy material manufactured in the casting step, the segregation reduction step satisfying formula (1). Each of the symbols in formula (1) is as described below. VR: solidification cooling rate (°C/min) of liquid alloy in casting step; Tn: uniform heating temperature (°C) in nth instance of uniform heating process; tn: time (hr) for retention at uniform heating temperature in nth instance of uniform heating process; Rdn - 1: cumulative reduction (%) of cross-section of Ni-based alloy material before nth instance of uniform heating process; N: total number of instances of uniform heating process.
Inventors:
TAKAGI TAKAMITSU (JP)
TERUNUMA MASAAKI (JP)
TAKEDA KIYOKO (JP)
TERUNUMA MASAAKI (JP)
TAKEDA KIYOKO (JP)
Application Number:
PCT/JP2018/043878
Publication Date:
June 06, 2019
Filing Date:
November 28, 2018
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22F1/10; C22C19/05; C22F1/00
Domestic Patent References:
| WO2010038680A1 | 2010-04-08 | |||
| WO2010038680A1 | 2010-04-08 |
Foreign References:
| JPH01136939A | 1989-05-30 | |||
| JPS60211029A | 1985-10-23 |
Other References:
See also references of EP 3719165A4
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
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